Down Syndrome Results From Which Of The Following Chromosomal Abnormalities?

(Correct Answer Below)

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Down Syndrome Results From Which Of The Following Chromosomal Abnormalities?

a) translocation of genetic material on chromosome 21 b) all or part of a third copy of chromosome 21 c) a truncated copy of chromosome 3 d) the absence of a second copy of chromosome 10 e) two Y chromosomes
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all or part of a third copy of chromosome 21

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